Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 2488
interventional 1788
Observational 656
Registry 44

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Drug 816
Drug|placebo 201
Other 137
Biological 131
Device 70
Behavioral 69
Procedure 68
Biological|placebo 42
Dietary Supplement|placebo 33
Dietary Supplement 30
Drug|Other 30
Diagnostic Test 18
Drug|Procedure 17
Device|Other 15
Biological|Drug 10
Biological|Other 8
Device|Drug 7
Other|Procedure 7
Other|placebo 6
Drug|Other|placebo 5
Behavioral|Drug 4
Device|Procedure 4
Dietary Supplement|Drug 4
Dietary Supplement|Drug|placebo 4
Behavioral|Other 3
Behavioral|Procedure 3
Biological|Drug|placebo 3
Biological|Procedure 3
Combination Product 3
Device|Drug|Other 3
Biological|Drug|Other 2
Biological|Drug|Procedure 2
Combination Product|Other 2
Diagnostic Test|Other 2
Drug|placebo|Procedure 2
Genetic 2
Behavioral|Biological 1
Behavioral|Device 1
Behavioral|Dietary Supplement|placebo 1
Behavioral|Drug|Genetic|Procedure 1
Behavioral|Drug|Other 1
Biological|Device|Drug 1
Biological|Drug|Other|placebo 1
Biological|Genetic|Other 1
Biological|Other|Procedure 1
Biological|placebo|Procedure 1
Combination Product|Diagnostic Test 1
Combination Product|Dietary Supplement|placebo 1
Device|Drug|placebo 1
Device|Drug|Procedure 1
Device|placebo 1
Diagnostic Test|Drug 1
Dietary Supplement|Other 1
Drug|Other|Procedure 1
Drug|Procedure|Radiation 1
placebo 1
placebo|Procedure 1
Procedure|Radiation 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country Study_Count
United States 607
NA 161
France 78
Canada 52
China 52
Spain 40
Switzerland 37
United States|Puerto Rico 35
United Kingdom 33
United States|Canada 31
Germany 29
Taiwan 26
Thailand 21
Italy 19
Japan 19
Netherlands 18
Mexico 17
Russian Federation 17
Australia 14
Egypt 14
Korea, Republic of 14
Denmark 13
Israel 13
Sweden 13
Brazil 12
Belgium 11
Kenya 11
India 10
Turkey 10
Bangladesh 9
Finland 7
Greece 7
Norway 7
United States|Canada|Puerto Rico 7
Hong Kong 5
South Africa 5
United States|Tanzania 5
Vietnam 5
Bulgaria 4
Colombia 4
Croatia 4
Ethiopia 4
Iran, Islamic Republic of 4
Nigeria 4
Peru 4
United States|United Kingdom 4
Austria 3
Poland 3
Singapore 3
Tanzania 3
Australia|New Zealand 2
Belgium|France 2
Belgium|Spain 2
Chile 2
Hungary 2
Indonesia 2
Malaysia 2
Pakistan 2
Panama 2
Rwanda 2
Uganda 2
Ukraine 2
United States|Australia 2
United States|Australia|Canada|France|Germany|New Zealand|Puerto Rico|United Kingdom 2
United States|France 2
United States|New Zealand|Puerto Rico 2
Zambia 2
Algeria|Australia|Austria|Belgium|Bulgaria|Canada|Denmark|Finland|France|Germany|Greece|Ireland|Israel|Italy|Mexico|Netherlands|Norway|Poland|Portugal|Romania|Russian Federation|Saudi Arabia|Spain|Sweden|Switzerland|Turkey|United Kingdom 1
Argentina|Brazil|Canada|United Kingdom 1
Argentina|Brazil|Mexico|Peru|Russian Federation|South Africa|Thailand 1
Argentina|United States|Austria|Brazil|Chile|Germany|Latvia|Mexico|Poland|Russian Federation|Ukraine|United Kingdom 1
Australia|China|Denmark|Finland|France|Germany|Greece|Hong Kong|India|Italy|Philippines|Portugal|Saudi Arabia|South Africa|Spain|Switzerland|Taiwan|Turkey|United Kingdom 1
Australia|United Kingdom 1
Austria|Belgium|Bulgaria|Canada|Denmark|France|Germany|Greece|Hungary|Ireland|Italy|Netherlands|Poland|Serbia|Slovakia|Spain|Sweden|United Kingdom 1
Austria|Belgium|Bulgaria|France|Germany|Greece|Hungary|Ireland|Israel|Italy|Latvia|Lithuania|Netherlands|Poland|Romania|Russian Federation|South Africa|Spain|Ukraine|United Kingdom 1
Austria|Belgium|France|Germany|Saudi Arabia|Spain|United Kingdom 1
Austria|Belgium|France|Germany|Spain|United Kingdom 1
Austria|France|Germany|Italy 1
Austria|France|Greece|Italy|Poland|Russian Federation|United Kingdom 1
Austria|Germany|Italy|Russian Federation|Spain 1
Belarus|Russian Federation|Ukraine 1
Belgium|Australia|Bulgaria|Estonia|Hungary|Israel|Latvia|Malaysia|Philippines|Poland|Slovakia|Spain|Thailand|United Kingdom 1
Belgium|Bulgaria|Chile|Colombia|Croatia|Czechia|Estonia|Germany|Hungary|Israel|Latvia|Malaysia|Philippines|Poland|Slovakia|Spain|Thailand 1
Belgium|Canada 1
Belgium|Czech Republic|Lithuania 1
Belgium|France|Germany|Italy|Romania|Russian Federation|Spain|Switzerland|United Kingdom 1
Belgium|France|Germany|Portugal|Spain|Sweden|Switzerland|United Kingdom 1
Belgium|France|Germany|United Kingdom 1
Belgium|France|Italy|Lithuania 1
Belgium|France|Monaco 1
Belgium|Germany|Israel 1
Belgium|Mauritius|Moldova, Republic of 1
Benin 1
Benin|Canada|Ghana|Indonesia|Vietnam 1
Bosnia and Herzegovina 1
Botswana 1
Botswana|Kenya|Malawi|Mozambique|South Africa|Tanzania|Zimbabwe 1
Botswana|Tanzania|Zambia|Zimbabwe 1
Brazil|Cambodia|Cameroon|Ethiopia|India|Tanzania|Vietnam 1
Brazil|United States|Argentina|Colombia|Greece|Israel|Italy|United Kingdom 1
Bulgaria|China|Hong Kong|Korea, Republic of|New Zealand|Poland|Taiwan|United Kingdom 1
Bulgaria|Germany|Romania|Serbia 1
Bulgaria|United States|Austria|Estonia|Georgia|Hungary|Latvia|Moldova, Republic of|Romania|Russian Federation|Slovakia|Ukraine 1
Canada|Czech Republic|Egypt|France|Greece|Jordan|Portugal|Russian Federation|Spain|Switzerland|Turkey|United Kingdom 1
Canada|France 1
Canada|Netherlands 1
Canada|Russian Federation|Ukraine 1
Chile|United States|Argentina|Bulgaria|Croatia|Estonia|Germany|Hungary|Israel|Korea, Republic of|Latvia|Lithuania|Moldova, Republic of|Poland|Serbia 1
China|Hong Kong|Indonesia|Korea, Republic of|Malaysia|Taiwan 1
China|Hong Kong|Korea, Republic of|Taiwan|Vietnam 1
China|Korea, Republic of|Taiwan 1
China|Korea, Republic of|Vietnam 1
China|Pakistan|Philippines 1
Congo 1
Congo, The Democratic Republic of the 1
Costa Rica 1
Croatia|Czechia|Israel|Latvia|United States|Argentina|Australia|Austria|Belarus|Bosnia and Herzegovina|Brazil|Bulgaria|Canada|Colombia|Denmark|Estonia|Georgia|Germany|Greece|Hungary|Lithuania|Mexico|Netherlands|North Macedonia|Peru|Poland|Portugal|Puerto Rico|Romania|Russian Federation|Serbia|Slovakia|South Africa|Spain|Turkey|Ukraine|United Kingdom 1
Cuba 1
Czech Republic 1
Estonia|Russian Federation 1
Ethiopia|Rwanda 1
Fiji 1
France|Germany|Netherlands 1
France|Lithuania|Spain|United Kingdom 1
French Guiana 1
Gambia 1
Georgia 1
Georgia|Greece|Hungary|Latvia|Lithuania|Poland|Romania|Estonia|United States|Belarus|Bulgaria|Croatia|Czechia|Russian Federation|Slovakia|Ukraine 1
Germany|Israel|Italy 1
Germany|Netherlands 1
Germany|Poland 1
Germany|Switzerland 1
Germany|United Kingdom 1
Germany|United States|Australia|Canada|Denmark|France|Italy|Sweden|Switzerland|United Kingdom 1
Germany|United States|Belgium|Canada|France|Hong Kong|Italy|Puerto Rico|United Kingdom 1
Ghana 1
Guatemala 1
India|Malawi|South Africa|Tanzania|Uganda|Zambia|Zimbabwe 1
Iraq 1
Ireland 1
Italy|United States|Austria|Belgium|Denmark|France|Germany|Greece|Israel|Netherlands|Spain|United Kingdom 1
Kazakhstan|Russian Federation 1
Kenya|Malawi|South Africa|Tanzania|Uganda|Zimbabwe 1
Kenya|Tanzania|Thailand|Uganda 1
Kenya|Uganda 1
Kenya|Zimbabwe 1
Korea, Republic of|China|Taiwan 1
Lao People’s Democratic Republic 1
Latvia|Austria|Belgium|Denmark|France|Germany|Ireland|Italy|Netherlands|Portugal|Spain|Switzerland|United Kingdom 1
Latvia|United States|Argentina|Bulgaria|Canada|Chile|Czechia|Germany|Greece|Hungary|Lithuania|Mexico|Peru|Romania|Russian Federation|Ukraine 1
Lebanon 1
Lithuania|United States|Argentina|Bulgaria|Estonia|Germany|Hungary|Latvia|Peru|Romania|South Africa 1
Madagascar 1
Malawi 1
Malawi|South Africa 1
Malaysia|Philippines|Thailand|Vietnam 1
Moldova, Republic of 1
Norway|Sweden 1
Papua New Guinea 1
Poland|Russian Federation 1
Romania|Argentina|Belgium|Bulgaria|Estonia|France|Germany|Greece|Israel|Latvia|Lithuania|Russian Federation|South Africa|Spain 1
Romania|South Africa 1
Russian Federation|Sweden 1
Russian Federation|Ukraine 1
Russian Federation|United States|Canada|Croatia|Georgia|Germany|Poland|Ukraine 1
Russian Federation|Uzbekistan 1
Saudi Arabia 1
Sierra Leone 1
South Africa|Tanzania|Uganda|Zambia 1
South Africa|Uganda|Zambia 1
South Africa|United States|Brazil|Colombia|Estonia|Georgia|Germany|Hungary|Israel|Latvia|Mexico|Moldova, Republic of|Romania|Russian Federation|Serbia|Slovakia|Thailand 1
Spain|Switzerland|United Kingdom 1
Spain|United States|Austria|Belgium|Canada|France|Germany|Italy|Latvia|Luxembourg|Poland|Portugal|Romania|Switzerland 1
Sri Lanka 1
Sweden|Spain|United States|Argentina|Australia|Canada|France|Germany|Italy|Korea, Republic of|Mexico|Russian Federation|South Africa 1
Tunisia 1
United States|American Samoa|Australia 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Chile|Colombia|Czechia|Estonia|Finland|France|Germany|Hungary|Israel|Italy|Japan|Korea, Republic of|Latvia|Lithuania|Mexico|New Zealand|Panama|Poland|Russian Federation|South Africa|Spain|Sweden|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|China|Colombia|Croatia|Denmark|Estonia|Finland|France|Germany|Greece|Hungary|India|Italy|Korea, Republic of|Latvia|Lithuania|Mexico|Panama|Peru|Poland|Portugal|Romania|Russian Federation|Slovakia|South Africa|Spain|Sweden|Switzerland|Taiwan|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Australia|Belarus|Belgium|Brazil|Bulgaria|Canada|Chile|Czechia|Germany|Greece|Hungary|Korea, Republic of|Mexico|New Zealand|Peru|Poland|Portugal|Russian Federation|Spain 1
United States|Argentina|Australia|Belgium|Brazil|Bulgaria|Chile|China|Croatia|Czechia|France|Germany|Greece|Hong Kong|Israel|Italy|Korea, Republic of|Mexico|Peru|Philippines|Poland|Romania|Russian Federation|South Africa|Spain|Taiwan|Turkey|Ukraine 1
United States|Argentina|Australia|Belgium|Brazil|Canada|Chile|France|Greece|Hungary|Italy|Mexico|Netherlands|Poland|Romania|Russian Federation|South Africa|Spain|Taiwan|United Kingdom 1
United States|Argentina|Australia|Belgium|Canada|France|Germany|Italy|Korea, Republic of|Mexico|Netherlands|Portugal|Romania|Russian Federation|South Africa|Spain|Taiwan|United Kingdom 1
United States|Argentina|Australia|Brazil|Germany|Mexico|New Zealand|Poland|Russian Federation|South Africa|Spain 1
United States|Argentina|Belarus|Bulgaria|Chile|Colombia|Georgia|Greece|Guatemala|Latvia|Lithuania|Mexico|Panama|Poland|Romania|Russian Federation|South Africa|Spain|Ukraine 1
United States|Argentina|Belarus|Bulgaria|Croatia|Estonia|Georgia|Hungary|Latvia|Lithuania|Mexico|Peru|Poland|Russian Federation|Serbia|Slovakia|South Africa|Spain|Ukraine 1
United States|Argentina|Belgium|Brazil|Chile|Colombia|Italy|Malaysia|Mexico|Portugal|Russian Federation|Singapore|South Africa|Spain|United Kingdom|Venezuela 1
United States|Argentina|Brazil|Bulgaria|Chile|Estonia|Georgia|Hungary|Korea, Republic of|Latvia|Mexico|Moldova, Republic of|Peru|Romania|Slovakia|Taiwan 1
United States|Argentina|Brazil|Bulgaria|Croatia|Czechia|Germany|Greece|Hungary|Israel|Japan|Korea, Republic of|Mexico|Poland|Portugal|Romania|Russian Federation|Serbia|Slovakia|Taiwan|Turkey|Ukraine 1
United States|Argentina|Brazil|Canada|Chile|Mexico 1
United States|Argentina|Brazil|Canada|Czechia|Germany|Hungary|Latvia|Peru|Slovakia|Ukraine 1
United States|Argentina|Brazil|Chile|Germany|Mexico|Peru|Poland|Romania|Russian Federation|Ukraine 1
United States|Argentina|Brazil|Colombia|Czechia|Germany|Hungary|Malaysia|Mexico|Norway|Poland|Portugal|Romania|South Africa|Spain|Sweden|United Kingdom 1
United States|Argentina|Bulgaria|Croatia|Czechia|France|Israel|Korea, Republic of|Mexico|Peru|Philippines|Poland|Romania|Russian Federation|South Africa|Spain|Turkey|Ukraine 1
United States|Argentina|Bulgaria|Croatia|Czechia|Germany|Israel|Italy|Korea, Republic of|Mexico|Peru|Poland|Romania|Russian Federation|Spain|Taiwan|Ukraine 1
United States|Argentina|Bulgaria|Croatia|Czechia|Hungary|India|Israel|Latvia|Malaysia|Mexico|Netherlands|Peru|Romania|Russian Federation|South Africa|Spain|Taiwan|Thailand|Ukraine 1
United States|Argentina|Bulgaria|Czech Republic|Estonia|France|Germany|Latvia|Lithuania|Romania|Russian Federation|South Africa|Ukraine 1
United States|Argentina|Canada|France|Italy|Mexico|Portugal|Puerto Rico|Russian Federation|South Africa|Spain|Thailand|United Kingdom 1
United States|Argentina|Chile|Costa Rica|Germany|Mexico|Netherlands|South Africa|Taiwan 1
United States|Argentina|Chile|Georgia|Latvia|Lithuania|Poland|Romania|South Africa|Spain 1
United States|Argentina|Georgia|Russian Federation|Serbia 1
United States|Argentina|Germany|Korea, Republic of|Romania|Spain 1
United States|Australia|Belgium|France|Israel|Italy|Korea, Republic of|Netherlands|New Zealand|Poland|United Kingdom 1
United States|Australia|Belgium|Germany|Italy|New Zealand|Russian Federation|United Kingdom 1
United States|Australia|Belgium|Israel|Netherlands|Russian Federation|Spain 1
United States|Australia|Bulgaria|Canada|Chile|Denmark|Finland|Germany|Hungary|Netherlands|New Zealand|Panama|Puerto Rico|South Africa|Spain|Sweden|Turkey|Ukraine|United Kingdom 1
United States|Australia|Canada|France|Germany|Italy|New Zealand|Puerto Rico|United Kingdom 1
United States|Australia|India|Italy|Romania|Ukraine 1
United States|Australia|Korea, Republic of|Taiwan 1
United States|Australia|New Zealand|United Kingdom 1
United States|Austria|Belgium|Canada|Chile|China|Denmark|Finland|France|Germany|Greece|Israel|Italy|Malaysia|Netherlands|Norway|Poland|Portugal|Saudi Arabia|Singapore|Slovakia|Spain|Sweden|Switzerland|United Kingdom 1
United States|Austria|Canada|Denmark|France|Germany|Ireland|Italy|Netherlands|Spain|United Kingdom 1
United States|Austria|France|Israel|Spain|United Kingdom 1
United States|Austria|Ireland 1
United States|Bahamas|Brazil|Puerto Rico 1
United States|Belarus|Belgium|Brazil|Estonia|France|Georgia|India|Israel|Latvia|Mexico|Russian Federation|Serbia|South Africa|Turkey|Ukraine 1
United States|Belarus|Belgium|Canada|Czechia|Estonia|France|Georgia|Germany|Israel|Latvia|Lithuania|Peru|Spain 1
United States|Belgium|Canada|France|Germany|Italy|Portugal|Spain|United Kingdom 1
United States|Belgium|Canada|Germany|Spain|Switzerland 1
United States|Belgium|Canada|Romania|Russian Federation|South Africa|Spain 1
United States|Belgium|Czechia 1
United States|Belgium|Germany|Ireland|Poland|Puerto Rico|United Kingdom 1
United States|Belgium|Germany|Italy|Taiwan 1
United States|Belgium|Germany|Puerto Rico|Spain 1
United States|Belgium|Italy|United Kingdom 1
United States|Belgium|Mexico|South Africa|Taiwan|Ukraine 1
United States|Belgium|United Kingdom 1
United States|Brazil 1
United States|Brazil|Bulgaria|Germany|Mexico|Poland|South Africa|Turkey 1
United States|Brazil|Canada 1
United States|Brazil|Colombia|Costa Rica|Ecuador|Mexico|Panama|Peru|Puerto Rico 1
United States|Brazil|Croatia|France|Germany|Greece|Guatemala|Israel|Italy|Japan|Korea, Republic of|Spain|Taiwan|Thailand|Turkey|United Kingdom 1
United States|Brazil|Hungary|Lithuania|Malaysia|Mexico|Romania|Russian Federation|South Africa|Spain|Turkey|Ukraine 1
United States|Brazil|Malawi|Peru|South Africa|Thailand|Zimbabwe 1
United States|Brazil|Mexico|Puerto Rico|South Africa 1
United States|Brazil|Peru|Switzerland 1
United States|Brazil|Puerto Rico|South Africa|Thailand 1
United States|Brazil|Puerto Rico|South Africa|Thailand|Uganda 1
United States|Bulgaria|China|Croatia|Hungary|Latvia|Mexico 1
United States|Bulgaria|Colombia|Greece|Norway|Poland|Ukraine|United Kingdom 1
United States|Bulgaria|Croatia|Estonia|Georgia|Hungary|Latvia|Romania|Russian Federation|Serbia|South Africa|Ukraine 1
United States|Bulgaria|Croatia|Greece|Hungary|Israel|Latvia|Peru|Poland|Romania|South Africa|Spain|Turkey|Ukraine 1
United States|Bulgaria|Czechia|Estonia|Georgia|Hungary|Latvia|Lithuania|Romania|Russian Federation|Ukraine 1
United States|Bulgaria|Czechia|Estonia|Georgia|Hungary|Latvia|Moldova, Republic of|Poland|Romania|Russian Federation|Serbia|Slovakia|South Africa|Ukraine 1
United States|Bulgaria|Czechia|Poland 1
United States|Bulgaria|Estonia|Hungary|Israel|Korea, Republic of|Latvia|Lithuania|Romania|Russian Federation|Slovakia|South Africa|Taiwan|Ukraine 1
United States|Bulgaria|France|India|Lebanon|Poland|Romania|Russian Federation 1
United States|Bulgaria|Germany|India 1
United States|Bulgaria|Germany|Lebanon|Poland|Russian Federation|Turkey 1
United States|Bulgaria|Hungary|Ukraine 1
United States|Bulgaria|India|Latvia|Lithuania|Romania 1
United States|Canada|Dominican Republic|Japan|Spain|Taiwan|Thailand 1
United States|Canada|Finland|Germany|Philippines|Thailand|United Kingdom 1
United States|Canada|Finland|Germany|Thailand 1
United States|Canada|France|Germany|Spain 1
United States|Canada|Netherlands|Puerto Rico 1
United States|China|Philippines|Taiwan 1
United States|China|South Africa|Spain 1
United States|Colombia|Czechia|France|Israel|Italy|Spain|Taiwan 1
United States|Colombia|France|Israel|Mexico|Philippines|Poland|Russian Federation|South Africa|Spain|Turkey 1
United States|Costa Rica|Panama|Puerto Rico 1
United States|Croatia|Israel|Latvia|Russian Federation|Spain|Ukraine 1
United States|Czechia|Greece|Hungary|Poland|Romania|Russian Federation|Spain|Taiwan|Turkey 1
United States|Czechia|Greece|Hungary|Poland|Romania|Russian Federation|Taiwan|Turkey 1
United States|Czechia|United Kingdom 1
United States|Finland|Mexico 1
United States|France|Germany|Spain 1
United States|France|Korea, Republic of|Sweden|Switzerland 1
United States|France|United Kingdom 1
United States|Georgia 1
United States|Germany|Poland 1
United States|Germany|Poland|Sweden 1
United States|Greece|Hungary|Mexico|Poland|Romania|Russian Federation|South Africa|Turkey|Ukraine 1
United States|Guatemala 1
United States|Guinea|Liberia|Sierra Leone 1
United States|Hungary|Latvia|Poland|Serbia 1
United States|India 1
United States|India|Korea, Republic of|Romania|Taiwan 1
United States|India|Panama 1
United States|Israel 1
United States|Israel|South Africa 1
United States|Italy 1
United States|Italy|Puerto Rico| 1
United States|Kenya|South Africa|Thailand 1
United States|Malawi|South Africa|Zambia|Zimbabwe 1
United States|Mexico 1
United States|Peru|South Africa 1
United States|Puerto Rico|South Africa 1
United States|Slovakia|Spain|Taiwan 1
United States|South Africa|Taiwan|Thailand 1
United States|Taiwan|Argentina|Australia|Belgium|Canada|France|Germany|Italy|Mexico|Peru|Poland|Portugal|Romania|Russian Federation|Spain|Switzerland|United Kingdom 1
United States|Ukraine 1
United States|Zimbabwe 1

Sites per Study

Site_count Study_Count
1 1027
2 113
3 56
4 45
5 50
6 27
7 26
8 17
9 22
10 12
11 20
12 13
13 11
14 15
15 18
16 13
17 14
18 7
19 12
20 6
21 12
22 12
23 3
24 4
25 6
26 7
27 5
28 8
29 2
30 8
31 5
32 4
33 9
34 8
35 6
36 2
37 4
38 4
39 6
40 7
41 1
42 3
43 6
44 2
45 6
46 6
47 3
48 3
49 5
50 9
51 4
52 5
53 2
54 4
55 1
56 2
57 4
58 1
59 4
60 3
61 2
62 3
66 3
67 2
68 2
69 4
70 1
71 4
72 2
73 1
74 1
75 1
76 4
78 3
80 1
84 4
85 1
89 1
90 1
91 1
92 2
93 2
94 1
96 1
100 1
104 1
105 1
106 1
108 1
115 1
118 1
120 1
123 1
126 1
137 1
178 1
179 1
180 1
181 1
187 1
205 1
211 1
277 1
617 1

Phase

Phase Study_Count
N/A 555
Phase 3 384
Phase 2 308
Phase 4 273
Phase 1 176
Phase 1/Phase 2 47
Phase 2/Phase 3 37
Early Phase 1 8

Number of Arms

Number_of_Arms Count_of_Studies
1 305
2 868
3 160
4 83
5 25
6 18
7 4
8 12
10 3
11 2
12 1
13 1
25 1
NA 305

Number of Updates

Count of Versions Count of Studies
1 233
2 224
3 209
4 210
5 157
6 113
7 80
8 70
9 56
10 53
11 41
12 40
13 41
14 27
15 14
16 23
17 15
18 16
19 17
20 14
21 7
22 8
23 11
24 6
25 8
26 6
27 4
28 2
30 4
31 4
32 6
33 5
34 4
35 3
36 2
37 2
38 1
40 2
41 3
42 3
43 2
44 4
45 2
47 2
48 1
49 2
50 1
51 1
55 3
56 1
62 1
63 1
65 2
68 2
70 1
72 2
73 2
87 1
88 1
93 1
94 1
96 1
114 1
118 1
121 1
125 1
189 1
197 1
203 1
242 1
421 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 13882 1555 8.927331
Contacts/Locations 6168 1291 4.777692
Recruitment Status 2359 1278 1.845853
None (earliest Version on record) 1788 1788 1.000000
Study Design 1610 1064 1.513158
Outcome Measures 1499 774 1.936692
Arms 1170 696 1.681034
Interventions 1170 696 1.681034
Eligibility 1155 644 1.793478
Study Identification 1126 677 1.663220
Study Description 1063 617 1.722852
Sponsor/Collaborators 1036 674 1.537092
Oversight 738 605 1.219835
Conditions 624 379 1.646438
More Information 606 248 2.443548
References 527 378 1.394180
Results 356 356 1.000000
IPDSharing 255 215 1.186047
Baseline Characteristics 148 125 1.184000
Reported Adverse Events 126 99 1.272727
Documents 117 111 1.054054
Participant Flow 109 92 1.184783
Results Submission Events 105 105 1.000000
2020 Study Status 4 3 1.333333
2020Recruitment Status 2 2 1.000000
2020 Baseline Characteristics 1 1 1.000000
2020 Documents 1 1 1.000000
Quality Control Review has not concludedReturned: April 28 1 1 1.000000
Quality Control Review has not concludedReturned: February 25 1 1 1.000000
Quality Control Review has not concludedReturned: June 4 1 1 1.000000
Quality Control Review has not concludedReturned: March 9 1 1 1.000000
Quality Control Review has not concludedReturned: May 12 1 1 1.000000
Quality Control Review has not concludedReturned: May 13 1 1 1.000000
Quality Control Review has not concludedReturned: May 27 1 1 1.000000
Quality Control Review has not concludedReturned: May 29 1 1 1.000000

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 1.000 1.000 2.0000 8.000 7.0000 2.0000 10.0000 6.0000
1st Qu. 10.000 60.000 20.0000 20.000 47.0000 50.0000 151.2500 72.5000
Median 15.000 221.000 32.0000 56.000 100.0000 154.0000 350.0000 169.0000
Mean 201.375 1566.178 55.6506 2798.267 220.3213 517.9189 758.4603 504.7978
3rd Qu. 78.500 718.000 56.0000 120.000 210.0000 380.0000 711.5000 393.0000
Max. 1306.000 126750.000 500.0000 118621.000 3101.0000 5659.0000 12793.0000 22089.0000

Trial Group Type

group_type Group_Count
Experimental 1843
Active Comparator 789
Placebo Comparator 356
NA 305
No Intervention 203
Other 108
Sham Comparator 13

Intervention Model

intervention_model Study_Count
Parallel Assignment 1140
Single Group Assignment 372
NA 164
Crossover Assignment 51
Sequential Assignment 34
Factorial Assignment 27

Primary Purpose

primary_purpose Study_Count
Treatment 1036
Prevention 492
Diagnostic 57
Basic Science 53
Health Services Research 37
Other 34
Supportive Care 32
NA 30
Screening 15
Device Feasibility 1
Educational/Counseling/Training 1

Observational Studies

Studies by Country

Country Study_Count
United States 188
France 74
NA 65
China 35
Spain 17
United Kingdom 16
Germany 15
Switzerland 14
Canada 12
Italy 12
Taiwan 12
Denmark 11
Israel 11
Netherlands 9
Thailand 9
Brazil 8
India 7
Austria 6
Egypt 6
Korea, Republic of 6
Japan 5
United States|Canada 5
Turkey 4
Australia 3
Belgium 3
Congo, The Democratic Republic of the 3
Finland 3
Hong Kong 3
Indonesia 3
Martinique 3
Norway 3
Russian Federation 3
Sweden 3
Tanzania 3
Uganda 3
Argentina 2
Cambodia 2
Mexico 2
Pakistan 2
Philippines 2
Poland 2
Argentina|Bangladesh|Brazil|Canada|Chile|China|Colombia|India|Iran, Islamic Republic of|Kazakhstan|Kyrgyzstan|Malaysia|Pakistan|Palestinian Territory, occupied|Peru|Philippines|Poland|Russian Federation|Saudi Arabia|South Africa|Sweden|Tanzania|Turkey|United Arab Emirates|Zimbabwe 1
Argentina|Barbados|Colombia|Sri Lanka|Thailand 1
Argentina|Chile|Colombia|Ecuador|Mexico|Peru|Uruguay 1
Austria|Belgium|Bulgaria|Croatia|Czech Republic|Denmark|Estonia|Finland|France|Germany|Greece|Hungary|Ireland|Italy|Latvia|Lithuania|Netherlands|Norway|Poland|Portugal|Romania|Russian Federation|Serbia|Slovenia|Spain|Sweden|Switzerland|Turkey|Ukraine|United Kingdom 1
Austria|Germany 1
Bangladesh 1
Belarus 1
Belgium|Cambodia|Congo, The Democratic Republic of the 1
Belgium|Czechia|Estonia|France|Italy|Netherlands|Romania|Serbia|Spain|United Kingdom 1
Belgium|Netherlands|United Kingdom 1
Bolivia|Chile 1
Botswana 1
Brazil|France|Greece|Italy|Russian Federation|Spain 1
Burkina Faso 1
Côte D’Ivoire|Indonesia|Mali|Nepal 1
Canada|Philippines 1
Croatia|Germany|Italy 1
Ecuador 1
Finland|Ireland|Netherlands|Portugal|Switzerland 1
Finland|Netherlands|Spain|United Kingdom 1
France|Belgium|Germany|Greece|Italy|Netherlands|Portugal|Spain|Turkey|United Kingdom 1
France|Germany|Italy|Spain|United Kingdom 1
France|Hungary|Italy|Poland|Spain 1
Gambia 1
Germany|Hungary|Norway|United Kingdom 1
Germany|Italy|United Kingdom 1
Greece 1
Hungary 1
Iran, Islamic Republic of 1
Ireland 1
Israel|Netherlands 1
Israel|United Kingdom 1
Kenya 1
Latvia 1
Lithuania 1
Moldova, Republic of 1
Mozambique 1
Myanmar 1
Peru 1
Portugal 1
Romania 1
Rwanda|South Africa 1
Sierra Leone 1
Suriname 1
Swaziland 1
Uganda|United Kingdom 1
United States|Argentina|Austria|Belgium|Canada|China|Denmark|Germany|Japan|Switzerland 1
United States|Australia|Brazil|Canada|Zimbabwe 1
United States|Australia|China|Colombia 1
United States|Austria|Israel|Switzerland|United Kingdom 1
United States|Brazil|Peru|South Africa 1
United States|Canada|Israel|Singapore|United Kingdom 1
United States|Denmark 1
United States|Dominican Republic|Haiti|Peru|Puerto Rico|South Africa 1
United States|Greece 1
United States|Greece|Italy|United Kingdom 1
United States|India 1
United States|Malawi|South Africa|Tanzania|Uganda 1
United States|Puerto Rico 1
Vietnam 1
Zimbabwe 1

Sites per Study

Site_count Study_Count
1 483
2 52
3 17
4 12
5 7
6 7
7 6
8 3
9 2
10 4
11 3
12 3
13 2
14 3
15 5
16 2
17 3
18 2
19 1
20 2
21 4
22 2
23 3
24 3
25 2
26 1
27 3
30 2
33 1
34 1
35 1
36 2
38 2
43 2
45 1
52 2
59 2
69 1
163 1
538 1

Number of Updates

Count of Versions Count of Studies
1 135
2 139
3 108
4 63
5 61
6 24
7 17
8 15
9 14
10 5
11 9
12 7
13 5
14 3
15 3
16 3
17 5
19 4
20 1
22 2
23 2
24 3
25 1
27 1
28 1
29 1
30 1
37 1
38 1
39 1
41 1
42 1
54 1
60 1
62 1
63 1
70 1
74 1
80 1
89 1
94 1
95 1
98 1
100 1
123 1
124 1
126 1
135 1
147 1
151 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 3999 521 7.675624
Contacts/Locations 1034 387 2.671835
Study Description 765 178 4.297753
None (earliest Version on record) 656 656 1.000000
Recruitment Status 629 393 1.600509
Study Design 605 354 1.709040
Eligibility 374 178 2.101124
Sponsor/Collaborators 272 189 1.439153
Study Identification 238 164 1.451220
Outcome Measures 222 157 1.414013
Conditions 190 134 1.417910
Oversight 155 127 1.220472
References 152 83 1.831325
Groups 139 105 1.323810
Interventions 139 105 1.323810
IPDSharing 35 32 1.093750
Results 33 33 1.000000
More Information 23 18 1.277778
Baseline Characteristics 10 8 1.250000
Documents 5 5 1.000000
Results Submission Events 5 5 1.000000
Reported Adverse Events 4 3 1.333333
Participant Flow 3 2 1.500000

Enrollment Metrics

Measure Observational
Min 0.00
1st Qu 100.00
Median 250.00
Mean 11672.87
3rd Qu 908.00
Max 1660652.00

Observation Model

observational_model Study_Count
Cohort 342
Case-Only 101
NA 68
Case-Control 46
Other 43
Case Control 28
Ecologic or Community 12
Natural History 5
Case Control, Natural History 3
Defined Population, Natural History 3
Case-Crossover 2
Family-Based 2
Defined Population 1

Time Perspective

time_perspective Study_Count
Prospective 443
Retrospective 104
NA 42
Cross-Sectional 39
Other 19
Longitudinal, Prospective 8
Longitudinal, Retrospective 1

Registries

Studies by Country

Country Study_Count
China 5
France 5
Italy 4
United States 4
Turkey 3
Belgium 2
Canada 2
Colombia 2
Spain 2
Sweden 2
Austria 1
Chile 1
Denmark 1
Denmark|Norway|Sweden 1
Ethiopia 1
Germany 1
Hong Kong|Korea, Republic of|Singapore|Taiwan|Thailand 1
NA 1
Singapore 1
Switzerland 1
Taiwan 1
United States|Australia|Belgium|Germany|Italy|New Zealand|Russian Federation|United Kingdom 1
United States|Australia|Canada|France|Germany|Italy|New Zealand|Puerto Rico|Spain|United Kingdom 1

Sites per Study

Site_count Study_Count
1 33
2 2
5 1
6 2
8 1
14 1
16 1
48 1
54 1
138 1

Number of Updates

Count of Versions Count of Studies
1 6
2 17
3 10
4 3
5 2
6 1
7 1
8 1
13 1
26 1
35 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 143 38 3.763158
Contacts/Locations 72 28 2.571429
None (earliest Version on record) 44 44 1.000000
Recruitment Status 28 23 1.217391
Study Design 22 17 1.294118
Eligibility 15 12 1.250000
Study Description 13 11 1.181818
Oversight 11 10 1.100000
Study Identification 11 9 1.222222
Sponsor/Collaborators 10 6 1.666667
Conditions 9 6 1.500000
Outcome Measures 7 7 1.000000
Groups 6 6 1.000000
Interventions 6 6 1.000000
References 3 2 1.500000
IPDSharing 2 2 1.000000

Enrollment Metrics

Measure Registries
Min 1.000
1st Qu 138.750
Median 472.000
Mean 1323.386
3rd Qu 1014.500
Max 15926.000

Registry Model

observational_model Study_Count
Cohort 27
Case-Control 7
Other 5
Case-Only 4
Case-Crossover 1

Time Perspective

time_perspective Study_Count
Prospective 40
Cross-Sectional 2
Other 2

Follow-up

target_duration Study_Count
5 Years 4
6 Months 4
1 Year 3
2 Weeks 3
30 Days 3
1 Day 2
10 Years 2
18 Years 2
2 Years 2
3 Months 2
3 Weeks 2
4 Weeks 2
1 Month 1
12 Months 1
14 Days 1
24 Months 1
28 Days 1
3 Years 1
31 Years 1
4 Months 1
4 Years 1
41 Weeks 1
60 Days 1
7 Months 1
8 Days 1